<template>
<div>

  <sign ref="signRef" ></sign>
  <br>
  <br>
  <br>
  <el-button type="primary" @click="start">start</el-button>
</div>
</template>

<script>
import sign from '@/components/sign.vue'
export default {
  data() {
    return {
      state: true
    }
  },
  components: {
    sign
  },
  methods:{
    start(){
      this.$refs.signRef.start()
    }
  }
}
</script>

<style scoped>

</style>